With notifications, you're alerted when you miss a call or receive a voice mail message. You can decide how and when you want to be alerted. For example, you can receive an email when you miss a call or get a text message when someone leaves a voice mail. By default, you'll receive an email anytime you miss a call, but text messaging notifications are turned off.
A custom phone greeting is a recording that plays automatically when a customer calls. They can be set to play right at the start as a professional welcome, as a voicemail greeting, or even as an away message when you can’t answer. Business phone greetings can give your small business a larger and more professional appearance.

Greetings. You’ve reached the office of [Name]. I’m either out of the office or gone for the day. However, your call is extremely import to me, so I’d appreciate it if you’d leave your message, along with your contact information, at the sound of the beep. Thank you for your call.
Note that the secretary has asked for the reason for calling so she can prioritize the patients who need the most help. She’s also keeping it short and to the point.